Hi The interesting thing about keeping ensembles of primary standards in line is that the boundary between “post processing” and “real time” blurs quite a bit. Looking at the papers, in many cases they are looking at all of what’s gone on over the last year or two and guessing at what will happen out to a few months from now.
Bob On Oct 11, 2014, at 1:18 PM, Jim Lux <[email protected]> wrote: > On 10/11/14, 8:08 AM, Bob Camp wrote: >> Hi >> >> To the extent that anything *is* locked, it’s been done for a lot longer >> than the 1980’s. Long before common view GPS, Loran-C observations (and >> corrections via clock trips) were used. You can look at it as a PLL, just a >> *very* fancy one with *very* long time constants. >> >> Bob >> >> > > It also depends on whether you need "lock in real time" or "lock in post > processing". > > VLBI is a good example of the latter, and was done in the early 70s to > determine the position of the moon rover, for example. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
